Yea sort of, but its quite confusing. There are two different games, which has been renamed in each region causing many confusion on the long run which game is which.

First of you have the gameboy title, called final fantasy adventures. Its the one that plays like a zelda game and its also the one that has been remade into the first mana game. It has been released under the names:JP -> Seiken Densetsu: Final Fantasy GaidenUSA -> Final Fantasy AdventuresEU -> Mystic Quest

Then you also have an RPG with a battle system like final fantasy itself. This one is released for the SNES and has bee released under the names:JP -> Final Fantasy USA Mystic Quest USA -> Final Fantasy Mystic QuestEU -> Mystic Quest Legend

Then you also have an RPG with a battle system like final fantasy itself. This one is released for the SNES and has bee released under the names:JP -> Final Fantasy USA Mystic Quest USA -> Final Fantasy Mystic QuestEU -> Mystic Quest Legend

This was the one I was talking about. At first, I had no idea what wee187 was talking about, then I googled Final Fantasy Adventure and it was called Mystic Quest in Europe. Then I google Final Fantasy Mystic Quest and find a completely different game. I was confused, but thanks.

Pretty much... every aspect of the game was criticized excluding the music (which was ultimately praised as stated above). Fans complained that it was way too simple and linear, "it didn't appeal to hardcore gamers" said critics.

Well easy said, Mystic Quest was Squares idea to make those "Dumb Americans" play an RPG. In those days RPGs where still not really that popular in the western culture and Square thought that the hard Japanese difficulty was the problem. So they made the battles supper easy, minimized the options by letting you control only 1 person and made the world map so linear that you possibly couldn't get lost

That right there is exactly why Final Fantasy Mystic Quest was hated. Way too simple and it didn't feel like a Final Fantasy. Don't be surprised when you ask a fan what his/her most hated Final Fantasy and they say FF: Mystic Quest. But in retrospect, wasn't this game mostly targeted for younger audiences?

Nope and probably yes. Originally it was really meant for the USA audience, but then again the average people playing Action Adventure/RPGs in the USA were mostly the youth. So yea in the end you can say that the younger audience was the target.

But to be honest even though the game gained many critics it still gained reasonable numbers. Scoring ratings as 3.5/5 or 7/10. After all it was a nice game to play despite the easy difficultie level.